Q 1: Why are the results in the WCC table mixed up?
Because there is no "one row per driver", as is clearly noted below the table. These are the Constructors' Championship results and so list the results for each constructor per race. The best result for each constructor goes on top, the lesser result on the bottom. WikiProject consensus for this arrangement was formed in 2017, and was supported in 2018. Any edit requests to "correct" the tables will therefore be rejected unless a new consensus is formed.